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34 #ifndef _VIRTIO_NET_H_
35 #define _VIRTIO_NET_H_
37 /* Used to indicate that the device is running on a data core */
38 #define VIRTIO_DEV_RUNNING 1
40 /* Backend value set by guest. */
41 #define VIRTIO_DEV_STOPPED -1
44 /* Enum for virtqueue management. */
45 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
48 * Structure contains variables relevant to TX/RX virtqueues.
50 struct vhost_virtqueue
52 struct vring_desc *desc; /* Virtqueue descriptor ring. */
53 struct vring_avail *avail; /* Virtqueue available ring. */
54 struct vring_used *used; /* Virtqueue used ring. */
55 uint32_t size; /* Size of descriptor ring. */
56 uint32_t backend; /* Backend value to determine if device should started/stopped. */
57 uint16_t vhost_hlen; /* Vhost header length (varies depending on RX merge buffers. */
58 volatile uint16_t last_used_idx; /* Last index used on the available ring */
59 volatile uint16_t last_used_idx_res; /* Used for multiple devices reserving buffers. */
60 eventfd_t callfd; /* Currently unused as polling mode is enabled. */
61 eventfd_t kickfd; /* Used to notify the guest (trigger interrupt). */
62 } __rte_cache_aligned;
65 * Device structure contains all configuration information relating to the device.
69 struct vhost_virtqueue *virtqueue[VIRTIO_QNUM]; /* Contains all virtqueue information. */
70 struct virtio_memory *mem; /* QEMU memory and memory region information. */
71 struct ether_addr mac_address; /* Device MAC address (Obtained on first TX packet). */
72 uint64_t features; /* Negotiated feature set. */
73 uint64_t device_fh; /* device identifier. */
74 uint32_t vmdq_rx_q; /* RX VMDQ queue number. */
75 uint32_t flags; /* Device flags. Only used to check if device is running on data core. */
76 uint32_t vlan_tag; /* Vlan tag for device. Currently set to device_id (0-63). */
77 uint16_t coreid; /* Data core that the device is added to. */
78 volatile uint8_t ready; /* A device is set as ready if the MAC address has been set. */
79 volatile uint8_t remove; /* Device is marked for removal from the data core. */
80 } __rte_cache_aligned;
83 * Device linked list structure for configuration.
85 struct virtio_net_config_ll
87 struct virtio_net dev; /* Virtio device. */
88 struct virtio_net_config_ll *next; /* Next entry on linked list. */
92 * Information relating to memory regions including offsets to addresses in QEMUs memory file.
94 struct virtio_memory_regions {
95 uint64_t guest_phys_address; /* Base guest physical address of region. */
96 uint64_t guest_phys_address_end; /* End guest physical address of region. */
97 uint64_t memory_size; /* Size of region. */
98 uint64_t userspace_address; /* Base userspace address of region. */
99 uint64_t address_offset; /* Offset of region for address translation. */
103 * Memory structure includes region and mapping information.
105 struct virtio_memory {
106 uint64_t base_address; /* Base QEMU userspace address of the memory file. */
107 uint64_t mapped_address; /* Mapped address of memory file base in our applications memory space. */
108 uint64_t mapped_size; /* Total size of memory file. */
109 uint32_t nregions; /* Number of memory regions. */
110 struct virtio_memory_regions regions[0]; /* Memory region information. */
114 * Device operations to add/remove device.
116 struct virtio_net_device_ops {
117 int (* new_device) (struct virtio_net *); /* Add device. */
118 void (* destroy_device) (volatile struct virtio_net *); /* Remove device. */
121 int init_virtio_net(struct virtio_net_device_ops const * const);
122 int deinit_virtio_net(void);
124 struct vhost_net_device_ops const * get_virtio_net_callbacks(void);
126 #endif /* _VIRTIO_NET_H_ */